You want to design a REST API endpoint for a long-running image processing task. Which approach best follows async response principles?

hard📝 Application Q15 of 15

Rest API - Advanced Patterns

AClient POSTs image, server returns 202 Accepted with a status URL; client polls status URL until done.

BClient POSTs image, server processes image immediately and returns 200 OK with result.

CClient POSTs image, server returns 404 Not Found if task is slow.

DClient POSTs image, server holds connection open until processing finishes.

Step-by-Step Solution

Solution:

Step 1: Understand async response design
Server accepts task, returns 202 with status URL for client to poll progress.
Step 2: Evaluate other options
Immediate processing (200 OK) blocks client; 404 is wrong status; holding connection open blocks client.
Final Answer:
Client POSTs image, server returns 202 Accepted with a status URL; client polls status URL until done. -> Option A
Quick Check:
Async design = 202 + status URL + polling [OK]

Quick Trick: Async = 202 + status URL + client polls [OK]

Common Mistakes:

MISTAKES

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